   "Resets the counters for a given sensor."
   [session where]
   (db/execute session
-   (hayt/update :sensors
-                (hayt/set-columns {:events 0
-                                   :errors 0})
-                (hayt/where where))))
+              (hayt/update :sensors
+                           (hayt/set-columns {:events 0
+                                              :errors 0})
+                           (hayt/where where))))
 
 (defn- where-from [m]
   [[= :device_id (:device_id m)] [= :type (:type m)]])

  [store m]
  (db/with-session [session (:hecuba-session store)]
    (let [sensor (sensor-exists? session m)
          events (-> sensor first :events)
          where  (where-from m)]
      (when (= events 1440) (reset-counters! session where))
      (update-sensor session sensor {:events (if-not (empty? events) (inc events) 1)})
      (-> m
          (number-check session sensor)
          (median-check session sensor)

  "Increment error counter and label median spike in metadata."
  [store sensor m]
  (db/with-session [session (:hecuba-session store)]
    (let [errors (get sensor :errors)]
      (update-sensor session sensor {:errors (if-not (nil? errors) (inc errors) 1)})
      (assoc-in m [:metadata "median-spike"] "true"))))

(defn larger-than-median
